单项选择题


Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now, listen to the passage.
Which of the following statements about clipper ships is CORRECT

A．They carried passengers, but not cargo.
B．They were large, but surprisingly fast.
C．They were the first successful steam-powered ships.
D．They were more reliable than other ships of the 1860’s.
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单项选择题
It can be inferred from the conversation that
A．the two speakers are the student and the professor.
B．the development of Iarge cities in the developing countries is not balanced.
C．the large cities in the developing countries grew as rapidly as those in the developed countries.
D．it’s easy to solve the problems of the large cities.
单项选择题
If students have a schedule conflict on the day of the exam, they should
A．take a make-up exam later on.
B．make every effort to come to class.
C．spend two extra hours in class later on.
D．do extra work at home.
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